Methods of treating metal carbonate salts
AssigneeEnergy & Environmental Research Center Foundation
InventorChristopher Lee Martin
Life of this patent
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Abstract
A method of treating a metal carbonate salt includes hydrolyzing a metal halide salt to form a hydrohalic acid and a hydroxide salt of the metal in the metal halide salt. The metal includes an alkaline earth metal or an alkali metal. The method includes reacting the hydrohalic acid with the metal carbonate salt, wherein the metal carbonate salt is a carbonate salt of the alkaline earth metal or alkali metal, to form CO2 and the metal halide salt. At least some of the metal halide salt formed from the reacting of the hydrohalic acid with the metal carbonate salt is recycled as at least some of the metal halide salt in the hydrolyzing of the metal halide salt to form the hydrohalic acid and the hydroxide salt.
Claims20
A method of regenerating a used CO2-capture sorbent, the method comprising:
- hydrolyzing a metal halide salt to form a hydrohalic acid and a hydroxide salt of the metal in the metal halide salt, the metal comprising an alkaline earth metal or an alkali metal;
- reacting the used CO2-capture sorbent with the hydroxide salt, to form a carbonate salt of the metal in the metal halide salt;
- and
- reacting the hydrohalic acid with the carbonate salt, to form CO2 and the metal halide salt, wherein at least some of the metal halide salt formed from the reacting of the hydrohalic acid with the carbonate salt is recycled as at least some of the metal halide salt in the hydrolyzing of the metal halide salt to form the hydrohalic acid and the hydroxide salt.
Dependencies are inferred from the claim text.